At this point, were like yeah, green is okay, when if these cards were in another set, wed be screaming at how good the color is
Blue decks are going to want a way to get the first poison counter onto an opponent so they can start proliferating, and this can easily help you get in for the last few points of damage or poison
Phantasmal Image is the only creature in the deck not cast naturally with Cavern of Souls or Unclaimed Territory, but both can name Illusion
It's strong everywhere, but it has enhanced value in archetypes that care about counters generally, +1/+1 counters specifically, proliferate tricks for multicolor brews looking to add loyalty counters for their planeswalkers, four and five-color decks, Commanders with evasion, Commanders with a power that, when increased by 1 get a faster kill, Equipment, Aura, and Voltron decks looking to get in kills with their Commander, and loads more
Tahngarth, First Mate